ci(test): update flutter version and remove java setup

Author: realth000

.github/workflows/test.yml

@@ -8,18 +8,14 @@ on:
   workflow_dispatch:
 
 env:
-  CI_FLUTTER_VERSION: '3.24.x'
+  CI_FLUTTER_VERSION: '3.29.x'
 
 jobs:
   flutter_test:
     name: Flutter test
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
-        with:
-          distribution: 'zulu'
-          java-version: '11'
       - uses: subosito/flutter-action@v2
         with:
           flutter-version: ${{env.CI_FLUTTER_VERSION}}